:root {
  color-scheme: light;
  --color-blue-900: #0b1020;
  --color-blue-800: #121a33;
  --color-blue-700: #1c2a52;
  --color-teal-500: #4fd1c5;
  --color-teal-400: #6ee7d8;
  --color-white: #ffffff;
  --color-white-soft: #f5f7fa;
  --color-gray-400: #a0aec0;
  --gradient-primary: linear-gradient(135deg, #0b1020 0%, #1c2a52 100%);
  --gradient-accent: linear-gradient(135deg, #121a33 0%, #4fd1c5 100%);
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.2);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --space-xxs: 4px;
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 64px;
  --space-xxl: 96px;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  background: var(--color-white);
  color: var(--color-blue-900);
  font-family: "Gantari", "Segoe UI", sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

.background-glow {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 12% 20%, rgba(79, 209, 197, 0.22), transparent 45%),
    radial-gradient(circle at 86% 12%, rgba(28, 42, 82, 0.2), transparent 40%),
    radial-gradient(circle at 60% 80%, rgba(110, 231, 216, 0.2), transparent 50%);
  pointer-events: none;
  z-index: -1;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  transition: background 0.4s ease, box-shadow 0.4s ease;
}

.site-header.scrolled {
  background: rgba(11, 16, 32, 0.9);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(6px);
}

.navbar {
  max-width: 1200px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  color: var(--color-white-soft);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  text-decoration: none;
  color: inherit;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.brand-logo {
  width: 102px;
  height: 102px;
  object-fit: contain;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.logo-loaded .brand-logo {
  opacity: 1;
  transform: translateY(0);
}

.brand-word {
  font-size: 1.05rem;
}

.nav-links {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

.nav-links a {
  color: inherit;
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.3s ease;
}

.nav-links a:hover {
  color: var(--color-white);
}

main {
  display: flex;
  flex-direction: column;
}

.hero {
  background: var(--gradient-primary);
  color: var(--color-white);
  padding: var(--space-xxl) 0 var(--space-xl);
}

.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-xl);
  align-items: center;
}

.hero-left,
.hero-right {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.hero-right {
  align-items: stretch;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-teal-400);
}

.hero h1 {
  font-family: "Gantari", "Segoe UI", sans-serif;
  font-size: clamp(3rem, 5vw, 3.6rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.hero-subcopy {
  color: var(--color-white-soft);
  max-width: 440px;
}

.hero-cta {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.accent {
  color: var(--color-teal-400);
}

.robot-frame {
  position: relative;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  box-shadow: var(--shadow-md);
  transform-style: preserve-3d;
}

.hero-left .robot-frame {
  margin-top: var(--space-sm);
  max-width: 420px;
}

.robot {
  width: min(320px, 100%);
  display: block;
  margin: 0 auto;
  filter: drop-shadow(0 14px 28px rgba(5, 10, 24, 0.35));
  animation: float 5s ease-in-out infinite;
}

.robot-wave {
  position: absolute;
  width: 34px;
  height: 34px;
  border: 3px solid var(--color-teal-400);
  border-radius: 50%;
  top: 56%;
  left: 15%;
  transform-origin: center;
  animation: wave 2.6s ease-in-out infinite;
  box-shadow: 0 0 0 10px rgba(79, 209, 197, 0.15);
}

.choice-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  width: min(420px, 100%);
}

.choice {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 22px;
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--color-blue-900);
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  transition: transform 0.4s ease, box-shadow 0.4s ease, color 0.4s ease;
  position: relative;
  overflow: hidden;
}

.choice::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(79, 209, 197, 0.16), rgba(11, 16, 32, 0.06));
  opacity: 0;
  transition: opacity 0.4s ease;
}

.choice:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 18px 40px rgba(11, 16, 32, 0.2);
  color: var(--color-blue-700);
}

.choice:hover::before {
  opacity: 1;
}

.choice-activated {
  transform: scale(0.98);
  box-shadow: inset 0 0 0 2px rgba(79, 209, 197, 0.45);
}

.choice-arrow {
  font-size: 1.2rem;
}

.section-block {
  padding: var(--space-xxl) 0;
}

.section-dark {
  background: var(--color-blue-900);
  color: var(--color-white-soft);
}

.section-gradient {
  background: var(--gradient-accent);
  color: var(--color-white);
}

.section-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-xl);
  align-items: start;
}

.section-inner.reverse {
  grid-template-columns: 1.2fr 1fr;
}

.section-text h2 {
  font-family: "Gantari", "Segoe UI", sans-serif;
  font-size: clamp(2rem, 3vw, 2.4rem);
  margin-bottom: var(--space-sm);
}

.section-text p {
  color: var(--color-white-soft);
  max-width: 420px;
}

.section-gradient .section-text p {
  color: rgba(255, 255, 255, 0.85);
}

.card-grid {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.card {
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.section-dark .card {
  background: linear-gradient(150deg, rgba(18, 26, 51, 0.7), rgba(28, 42, 82, 0.7));
}

.section-gradient .card {
  background: rgba(11, 16, 32, 0.32);
}

.card h3 {
  font-size: 1.1rem;
  margin-bottom: var(--space-xs);
  color: var(--color-white);
}

.card p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.95rem;
}

.cta-block {
  padding: var(--space-xxl) 24px;
  background: var(--gradient-accent);
  color: var(--color-white);
  text-align: center;
}

.cta-inner {
  max-width: 720px;
  margin: 0 auto;
  display: grid;
  gap: var(--space-sm);
  justify-items: center;
}

.cta-inner h2 {
  font-family: "Gantari", "Segoe UI", sans-serif;
  font-size: clamp(2.2rem, 4vw, 2.8rem);
}

.site-footer {
  background: var(--color-blue-900);
  color: var(--color-gray-400);
  padding: var(--space-xl) 24px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
}

.footer-links {
  display: grid;
  gap: var(--space-xs);
}

.footer-links a {
  color: inherit;
  text-decoration: none;
  font-size: 0.95rem;
}

.footer-links a:hover {
  color: var(--color-white-soft);
}

.footer-brand {
  margin-bottom: var(--space-xs);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.btn-primary {
  background: var(--color-teal-500);
  color: var(--color-blue-900);
  box-shadow: var(--shadow-sm);
}

.btn-secondary {
  background: transparent;
  color: var(--color-white-soft);
  border-color: rgba(255, 255, 255, 0.3);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-12px);
  }
}

@keyframes wave {
  0% {
    transform: translateY(0) rotate(0deg);
  }
  45% {
    transform: translateY(-6px) rotate(18deg);
  }
  100% {
    transform: translateY(0) rotate(0deg);
  }
}

@media (max-width: 980px) {
  .navbar {
    flex-wrap: wrap;
    justify-content: center;
  }

  .nav-links {
    order: 3;
    width: 100%;
    justify-content: center;
  }

  .hero-inner,
  .section-inner,
  .section-inner.reverse {
    grid-template-columns: 1fr;
  }

  .hero-right {
    align-items: stretch;
  }
}

@media (max-width: 640px) {
  .navbar {
    gap: var(--space-sm);
  }

  .nav-links {
    gap: var(--space-sm);
    flex-wrap: wrap;
  }

  .hero {
    padding-top: var(--space-xl);
  }

  .choice {
    font-size: 0.95rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}